Our experience with Calcium Sulfate indicates that a D50 of 2 microns can be easily achieved with our Jet Mill at very attractive prices. Reducing the particle size further to 1.5 microns doubled the energy requirements. We haven’t had any requests for finer sizes with this material so we don’t know how fine a grind is achievable without testing. Previous experience does indicate however that energy consumption goes up exponentially as finer sizes are achieved and at some very fine particle size, material dependent, a point of diminishing returns is reached with jet milling technology.

If standard jet milling technologies will not produce a finished size that is fine enough then we would suggest our new LiquaJet process. This high-energy nitrogen process will definitely grind many materials substantially finer, but the process is more expensive.